When 2Ten Hotel opens its doors to guests in June 2018, it will not only be one of the most modern buildings in Sibasa, but also a durable structure that will continue to add significant value for the owners of the asset well into the future.
These two important requirements for the new hotel, which is being built adjacent to the very popular EMM Convention Centre, were the main reasons for owner and developer, George Magwabeni, deciding to adopt a cutting-edge pre-cast building solution for his latest project.
This modular system, which was designed and manufactured, as well as now being installed by Corestruc on site about five kilometres outside Thohoyandou in Limpopo, South Africa, has a lifespan of more than 30 years. This will significantly reduce total cost of ownership for EMM Convention Centre’s management team.
Magwabeni is also proud to be at the cutting-edge of building technologies in the country, considering the growing popularity of modular systems internationally, where they are also being used to accelerate construction and enhance safety performances on site.
Meanwhile, Corestruc’s system has also helped overcome many of the space constraints on this construction site by doing away with the need to co-ordinate the timely delivery of concrete, as well as the extensive planning and processes involved in installing and dismantling formwork and scaffolding.
There is just enough space for the laydown area to receive the about nine wall panels and six slabs a day from the company’s pre-cast yard to complete the rest of the structure now that the columns, beams and floor slabs are in place.
Corestruc’s Russell Hobbs says the company’s installation teams have maintained a sound productivity rate on the project, despite the complexity of the build and heavy rainfall in the province in February and March this year.
One of the biggest challenges implementing Paragon Architect and Corestruc’s overall design is installing 840 square metres of wall panelling right around the structure to complete its striking façade.
The features and dimensions of the coping and panels have to be installed to tolerances of a minimum of two millimetres and a maximum of three millimetres.
“This would be near to the impossible employing conventional in-situ methods without significantly prolonging the building period,” Hobbs says.
These intricate items are manufactured using the company’s own self-compacting concrete (SCC) and specialised forms that were imported especially for the project from Australia.
This SCC mix adds to the overall durability requirements of the final build, with each of these items between 80 Mpa and 94 Mpa.
Just as impressive are the continuous columns extending all the way to the roof of the structure. They vary between 60 MPa and 70 Mpa, and each bears about 400 tons, including structural steel, as well as the pre-cast concrete, panels, beams and floor slabs, making up the hotel.
Joining Corestruc and Paragon Architects on this construction site is structural engineer, VBL Consulting Engineers, whose Paul Botha has nurtured a long working relationship with the pre-cast concrete specialist over the years, and introduced Magwabeni and his team to this unique method of building.